摘要
为了细化Mg-Al复合材料的晶粒,提高材料力学性能,借助SEM、拉伸等测试手段对SiC颗粒增强Mg-Al复合材料进行微观组织以及力学特性的测试。结果表明：复合材料由α-Mg、β-Mg17Al12和Mg2Si三种相组成,SiC颗粒成功添加至复合材料中。添加SiC颗粒之后,Mg-9Al复合材料的基体晶粒发生了明显细化,晶粒平均尺寸从158μm减小至108μm。复合材料经SiC颗粒增强后能够获得更优异的力学性能,抗拉强度、屈服强度、伸长率相应提升了46.4%、64.7%和82.6%。加入SiC颗粒后复合材料的拉伸断口形貌中出现了许多长条形的撕裂棱,局部也出现了韧窝。
In order to refine the grain of Mg-Al composites and improve the performance of mechanics of materials,Si C particle reinforced Mg-Al composite microstructure and mechanical properties test were carried out by means of SEM and tensile test.The results show that the composite materials consist ofα-Mg,β-Mg17Al12and Mg2Si three phase composition,and the Si C particles are added in composite materials successfully.After adding Si C particles,Mg-9Al composites refine obviously matrix grain,and the average grain size changes from 158μm to 108μm.After the Si C particles reinforced,the composite materials can obtain more excellent mechanical properties,tensile strength,yield strength and elongation increased by 46.4%,64.7%and 82.6%correspondingly.After adding Si C particles in composite materials,tensile fracture morphology appears many elongated torn edges,local area appears in the firm.
作者
刘丽娜
田晓光
申勤兵
LIU Lina1, TIAN Xiaoguang1, SHEN Qinbing2(1. School of Mechanical Engineering, Huanghe Jiaotong University, Jiaozuo 454950, China; 2. Bohai Sea Oil Equipment Manufacturing Co., Ltd, Qingxian 062650, Chin)
出处
《热加工工艺》
CSCD
北大核心
2018年第14期104-106,共3页
Hot Working Technology
关键词
复合材料
碳化硅颗粒
微观组织
力学性能
composite material
SiC particles
microstructure
mechanical properties
